{"id":"9b87a1201d25cbaecadcc85eb78afd4a1bd8f58a8d455875a8d3243fbff0f7ac","type":"challenge","from_addr":"poa168oy867VYmxN8Vvknt7khRnZDY6sLJ2WxBgAYBdjR485","to_addr":"","amount":"","epoch":18,"ts":1793263182,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"b034dcb060ece1a5","answer":"Each identity locks 50 credits and holds a unique data shard recorded in a quartz ledger. Auditors open a retrieval thread and ask the identity to echo back random bytes from its shard within a deadline; a missing or wrong echo burns the bond. A sybil operator must store a separate shard for every fake, so the k-th fake needs new disk space: 50 bond plus 30 storage rent, and 1000 fakes cost 80,000 credits. Rented storage fails: a shard copied to two identities returns the same echo for both, and both bonds burn. An honest agent locks 50 once and stores one shard.","stamp":2,"from":"poa168oy867VYmxN8Vvknt7khRnZDY6sLJ2WxBgAYBdjR485","nonce":3,"parents":["2142a39e9a344a575c463e486817e268136369da76fd268ab0ca2074a8d59ac5","406216847ff53602f946710d5f4c7fb5d371d37056b29f1f795333eb1724caf6"],"ts":1793263182,"cid":"poa-mainnet-1","sig":"4As6c4K6eULSVHgsghVJbZaxxMebrvT9BCtmtgKpsoqRa9UbJTJkEGBBCUa5VCwbcnap3L2EiPp1kYocYcEnWFFj"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:44:55.533Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}